Permanent magnet direct-driven vernier motor

Abstract

The invention discloses a permanent magnet direct-driven vernier motor which comprises an outer rotor, an outer rotor permanent magnet, a stator, a stator permanent magnet, windings, a motor shaft and a bearing, wherein the outer rotor is rotatably connected with the motor shaft through the bearing, the motor shaft is fixedly connected with the stator; the outer rotor permanent magnet is embedded in a rotor yoke; the stator is provided with stator teeth along the circumference, two sides of the top of the stator teeth are respectively provided with notches, a stator slot is formed between the adjacent two stator teeth; the windings are wound on the stator teeth; the end face of the stator permanent magnet is embedded in the notch of the adjacent two stator teeth; the stator permanent magnet and the outer rotor permanent magnet adopt radial magnetization, and the magnetization directions of the stator permanent magnet and the outer rotor permanent magnet are same; clearances are reserved between the stator permanent magnet and the outer rotor, as well as the stator teeth and the outer rotor, and the sum of the number of pole pairs (nr) of the outer rotor permanent magnet and the number of pole pairs (np) of the windings is the number (ns) of the stator teeth. The motor has simplified components and compact structure and can reduce the magnetic flux leakage and improve the motor efficiency.

Description

technical field [0001] The invention relates to a vernier motor, in particular to a permanent magnet direct drive vernier motor, which is especially used in a low-speed and high-torque environment. Background technique [0002] In order to avoid problems such as high noise, low efficiency, low transmission accuracy, slow response, and mechanical wear of mechanical gear transmission systems in industrial production, direct drive motors are often used. However, in order to obtain low-speed and high-torque output, traditional direct-drive motors are generally bulky and costly. The traditional direct drive motor mainly includes the outer rotor of the magnetic gear, the magnetic ring, the inner rotor of the magnetic gear and the motor stator. There is an air gap between the outer rotor of the magnetic gear and the inner rotor of the magnetic gear. There is also a layer of air gap between the motor stator and the inner rotor of the magnetic gear, and there are three layers of air...

AI Technical Summary

Problems solved by technology

Although there is one less air gap than the traditional direct-drive motor with three air gaps, the structure is still more complicated and the processing technology is more difficult

Large flux leakage and core loss, limited power density

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